US9354135B2 - Oil leak detection device - Google Patents

Oil leak detection device Download PDF

Info

Publication number
US9354135B2
US9354135B2 US13/981,447 US201213981447A US9354135B2 US 9354135 B2 US9354135 B2 US 9354135B2 US 201213981447 A US201213981447 A US 201213981447A US 9354135 B2 US9354135 B2 US 9354135B2
Authority
US
United States
Prior art keywords
polymer
oil leak
line
film layer
oil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US13/981,447
Other versions
US20130305815A1 (en
Inventor
Hong Geun Yu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YUMIN System Tech Co Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of US20130305815A1 publication Critical patent/US20130305815A1/en
Application granted granted Critical
Publication of US9354135B2 publication Critical patent/US9354135B2/en
Assigned to YUMIN SYSTEM TECHNOLOGY CO., LTD. reassignment YUMIN SYSTEM TECHNOLOGY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: YU, HONG GEUN
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/165—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means by means of cables or similar elongated devices, e.g. tapes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
    • G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/40—Investigating fluid-tightness of structures by using electric means, e.g. by observing electric discharges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means

Definitions

  • the present invention relates to an oil leak detection device and, more particularly, to an oil leak detection device directly attached to an oil pipeline, an oil tank, or a supply pipe, such as the place where oil is expected to leak, in a tape manner and configured to detect leaking oil and determine whether or not oil leaks simply and precisely.
  • Leak sensors using various methods for sensing oil leak are being used.
  • the applicant of the present invention already proposed an oil leak detection device, such as that shown in FIG. 10 of Korean Patent Application No. 10-2009-0065050.
  • a conductive line 42 made of a silver compound or pure conductive ink having 0 to 20 ⁇ is printed on a top surface of a base film layer 41 formed of a film, such as PET, PE, PTFE, or PVC in a length direction.
  • a conductive polymer line 43 is attached to the top surface of the base film layer 41 and is spaced apart from the conductive line 42 at a specific interval in parallel to the conductive line 42 .
  • the conductive polymer line 43 reacts to oil, such as hydrocarbone liquid, and detects whether or not oil leak has occurred by sensing a change of a resistance value due to the reaction.
  • oil such as hydrocarbone liquid
  • An upper protection film layer 50 is stacked over the base film layer 41 .
  • a plurality of holes 51 is formed in the upper protection film layer 50 at specific intervals in a length direction, and the holes 51 are formed at the same location as the location where the conductive polymer line 43 is attached.
  • the volume of the conductive polymer line 43 is increased by the porosity of the conductive polymer line 43 and thus a resistance value is increased.
  • a controller determines whether or not oil has leaked by reading a change of a resistance value.
  • the conventional oil leak detection device has a high probability that an error can occur because the conductive polymer line 43 for sensing oil leak is very sensitive to a change of temperature.
  • the conventional oil leak detection device is problematic in that oil leak is erroneously determined because a resistance value is changed due to an increase in the volume of the conductive polymer line 43 although oil leak is not generated when temperature rises due to a change of surrounding environments.
  • an object of the present invention is to provide an oil leak detection device, wherein a pair of polymer lines are formed in parallel on a tape base, only one of the polymer lines detects oil, and the other of the polymer lines functions as a reference line for a change of a resistance value attributable to a change of temperature and precisely detects oil leak irrespective of a change of temperature.
  • an oil leak detection device includes a base film layer configured in a tape form, a pair of polymer lines formed on a top surface of the base film layer in parallel in a length direction, a pair of conductive lines formed on the top surface of the base film layer in parallel to the pair of polymer lines in the length direction, and an upper protection film layer attached to the top surface of the base film layer and configured to have a plurality of sensing holes formed at specific intervals in the length direction at locations through which only one of the pair of polymer lines is exposed.
  • FIG. 1 is a perspective view of the present invention which is exploded for each layer;
  • FIG. 2 is a diagram showing a positional relationship between a polymer line and holes
  • FIG. 3 is a diagram showing a state in which a controller and an oil leak detection device are coupled
  • FIG. 4 is a block diagram showing an internal circuit of a controller
  • FIG. 5 is a graph showing a change in the resistance value of a polymer line attributable to a change of temperature
  • FIG. 6 is a diagram showing another embodiment of the present invention to which an oil pipeline is applied;
  • FIG. 7 is a diagram showing yet another embodiment of the present invention for detecting oil leak levels
  • FIG. 8 is a diagram showing a positional relationship between a polymer line and holes
  • FIG. 9 is a diagram illustrating a state in which an oil leak level is detected.
  • FIG. 10 is a diagram showing the structure of a conventional oil leak detection device.
  • FIG. 1 is a diagram showing the cross section of an oil leak sensor 10 in accordance with an embodiment of the present invention.
  • the oil leak sensor 10 is configured in a tape form in such a way as to be attached to a floor, the surface of a wall, or the outside of a pipe.
  • the oil leak sensor 10 includes an attachment layer 100 , a base layer 200 , and an upper protection layer 300 which are sequentially stacked from the bottom to the top.
  • the attachment layer 100 is attached to a place where oil leak is expected to occur and is formed of an adhesive tape, such a double-sided tape.
  • a pair of polymer lines 220 and 230 are attached to the top surface of the base layer 200 and are spaced apart from the conductive lines 210 and 240 at specific intervals in parallel to the conductive lines 210 and 240 .
  • the polymer lines 220 and 230 preferably are formed in close proximity, and the conductive lines 210 and 240 are formed outside the polymer lines 220 and 230 .
  • first conductive line 210 and the first polymer line 220 are electrically coupled by a connector, and the other ends of the second conductive line 240 and the second polymer line 230 are also electrically coupled likewise.
  • the polymer lines 220 and 230 can be made of porous or conductive polymer.
  • Each of the polymer lines 220 and 230 reacts to oil, such as hydrocarbone liquid, and detects whether or not oil leak has occurred by sensing a change of a resistance value due to the reaction.
  • oil such as hydrocarbone liquid
  • a method of attaching the polymer lines 220 and 230 to the base layer 200 can include a variety of methods, such as those using an adhesive, ultrasonic fusion, and thermal compression.
  • the polymer lines 220 and 230 can be attached the top surface of the base layer 200 simultaneously with the upper protection layer 300 when the upper protection layer 300 is attached to the top surface of the base layer 200 .
  • the upper protection layer 300 is placed over the base layer 200 .
  • a plurality of sensing holes 310 is formed in the upper protection layer 300 at specific intervals in a length direction so that only one (e.g., the polymer line 220 ) of the pair of polymer lines 220 and 230 is exposed externally as in FIG. 2 .
  • the polymer line 230 not exposed through the sensing holes 310 becomes a reference line for sensing a change of temperature.
  • the base layer 200 and the upper protection layer 300 stacked as described above are adhered together using thermal compression, ultrasonic fusion, or an adhesive.
  • parts other than the sensing holes 310 , the conductive lines 210 and 240 , and the polymer lines 220 and 230 are adhered, and the attachment layer 100 can be further attached to the bottom of the base layer 200 .
  • the oil leak sensor 10 couples the conductive lines 210 and 240 and a signal line 500 through a connector 400 so that the conductive lines 210 and 240 and a signal line 500 are connected to a controller 600 .
  • the processor 610 of the controller 600 controls a power source unit 620 so that the power source unit 620 supplies the first conductive line 210 with voltage having several V and determines whether oil leaks or not based on a voltage value from the first polymer line 220 .
  • the volume or the amount of adsorption of the first polymer line 220 is increased, so a resistance value in the first polymer line 220 is increased.
  • a voltage drop value that may occur depending on the length of the oil leak sensor 10 is previously set in a setting value storage unit 630 because voltage inputted to the processor 610 indispensably drops depending on the length of the oil leak sensor 10 . If a voltage drop value sensed by the first polymer line 220 is higher than the set voltage drop value, the processor 610 determines that oil leaks and outputs an alarm signal through a display unit 640 and an alarm generation unit 650 in order to inform a manager that oil has leaked.
  • the first polymer line 220 is made of polymer materials sensitive to temperature and thus sensitive to a change of external temperature. Accordingly, there is a need for a structure for compensating for the frequent error.
  • a change of a resistance value attributable to a change of temperature is compensated for using the second polymer line 230 adjacent to the first polymer line 220 as a reference.
  • the power source unit 620 supplies voltage of several V to the second conductive line 240
  • resistance values of the first polymer line 220 and the second polymer line 230 are identically increased according to a rise of temperature due to the supply of voltage as shown in FIG. 5( a ) .
  • the processor 610 determines a change of a resistance value attributable to a change of temperature as a normal operating state not oil leak.
  • the processor 610 determines that oil leak has occurred and thus outputs an alarm through the display unit 640 and the alarm generation unit 650 .
  • first polymer line 220 and the second polymer line 230 are formed in close proximity to the highest degree so that the same change of temperature is applied to the first polymer line 220 and the second polymer line 230 .
  • FIG. 6 is a diagram showing another embodiment of the present invention.
  • the oil leak sensor 10 of the present invention is received within a flexible pipe 730 in which a plurality of inlet holes 731 through which oil enters is formed.
  • Adsorption fabric 740 is placed within the pipe 730 in which the oil leak sensor 10 is received.
  • the pipe 730 is buried under an oil pipeline 750 buried in the ground and configured to sense oil leak generated from the oil pipeline 750 .
  • oil is introduced through the inlet holes 731 of the pipe 730 , the oil enters the oil leak sensor 10 through the adsorption fabric 740 and thus oil leak is sensed.
  • Both sides of the oil leak sensor 10 are introduced into the manhole 700 and are coupled by neighboring oil leak sensors and the connectors 720 .
  • a cover 710 is installed over the manhole 700 in order to open or close the manhole 700 . Accordingly, the oil leak sensor 10 and the connector 720 can be easily coupled.
  • FIG. 7 is a diagram showing yet another embodiment of the present invention.
  • Polymer lines 721 are diagonally formed on a top surface of a base layer 720 stepwise in a width direction.
  • the base layer 720 is formed of a film.
  • the polymer lines 721 are coupled by embedded lines 722 having electrical conductivity.
  • the polymer line 721 at the lowest is connected to a conductive line 723 and configured to receive sensing power from the controller 600 .
  • the polymer line 721 at the highest is also connected to the controller 600 and configured to supply the controller 600 with a voltage value attributable to a change of a resistance value.
  • An attachment layer 710 is stacked on a bottom surface of the base layer 720 .
  • An upper protection layer 730 is stacked on a top surface of the base layer 720 .
  • Sensing holes 731 are formed in the top surface of the base layer 720 so that the polymer lines 721 are externally exposed as in FIG. 8 .
  • the controller 600 is informed of a change in the resistance value of the polymer lines 721 at respective locations due to a change of an oil level.
  • the polymer lines 721 have the same width and length, and the lower end of one polymer line and the upper end of the other polymer line are placed on the same line. Accordingly, a continuous change of oil levels can be sensed based on a consecutive change of resistance values depending on the height of the polymer lines.
  • an oil leak sensor is lengthily installed upright and used as a water-level sensor as in the prior art, it is difficult to sense a continuous change of oil levels because of an interval between the sensing holes.
  • the present invention is advantageous in that a consecutive change of oil levels can be sensed.

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Pathology (AREA)
  • Biochemistry (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The present invention relates to an oil leak detection device. In an aspect, the oil leak detection device includes a base film layer 200 configured in a tape form, a pair of polymer lines 220, 230 formed on a top surface of the base film layer in parallel in a length direction, a pair of conductive lines 210, 240 formed on the top surface of the base film layer in parallel to the pair of polymer lines in the length direction, and an upper protection film layer 300 attached to the top surface of the base film layer and configured to have a plurality of sensing holes 310 formed at specific intervals in the length direction at locations through which only one of the pair of polymer lines is exposed.

Description

TECHNICAL FIELD
The present invention relates to an oil leak detection device and, more particularly, to an oil leak detection device directly attached to an oil pipeline, an oil tank, or a supply pipe, such as the place where oil is expected to leak, in a tape manner and configured to detect leaking oil and determine whether or not oil leaks simply and precisely.
BACKGROUND ART
Leak sensors using various methods for sensing oil leak are being used. The applicant of the present invention already proposed an oil leak detection device, such as that shown in FIG. 10 of Korean Patent Application No. 10-2009-0065050.
In the oil leak detection device, a conductive line 42 made of a silver compound or pure conductive ink having 0 to 20Ω is printed on a top surface of a base film layer 41 formed of a film, such as PET, PE, PTFE, or PVC in a length direction. A conductive polymer line 43 is attached to the top surface of the base film layer 41 and is spaced apart from the conductive line 42 at a specific interval in parallel to the conductive line 42.
The conductive polymer line 43 reacts to oil, such as hydrocarbone liquid, and detects whether or not oil leak has occurred by sensing a change of a resistance value due to the reaction.
An upper protection film layer 50 is stacked over the base film layer 41. A plurality of holes 51 is formed in the upper protection film layer 50 at specific intervals in a length direction, and the holes 51 are formed at the same location as the location where the conductive polymer line 43 is attached.
Accordingly, when oil flows in through the holes 51 of the upper protection film layer 50, the volume of the conductive polymer line 43 is increased by the porosity of the conductive polymer line 43 and thus a resistance value is increased.
As a result, a controller determines whether or not oil has leaked by reading a change of a resistance value.
However, the conventional oil leak detection device has a high probability that an error can occur because the conductive polymer line 43 for sensing oil leak is very sensitive to a change of temperature.
That is, the conventional oil leak detection device is problematic in that oil leak is erroneously determined because a resistance value is changed due to an increase in the volume of the conductive polymer line 43 although oil leak is not generated when temperature rises due to a change of surrounding environments.
DISCLOSURE Technical Problem
Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide an oil leak detection device, wherein a pair of polymer lines are formed in parallel on a tape base, only one of the polymer lines detects oil, and the other of the polymer lines functions as a reference line for a change of a resistance value attributable to a change of temperature and precisely detects oil leak irrespective of a change of temperature.
Technical Solution
In order to achieve the above object, an oil leak detection device includes a base film layer configured in a tape form, a pair of polymer lines formed on a top surface of the base film layer in parallel in a length direction, a pair of conductive lines formed on the top surface of the base film layer in parallel to the pair of polymer lines in the length direction, and an upper protection film layer attached to the top surface of the base film layer and configured to have a plurality of sensing holes formed at specific intervals in the length direction at locations through which only one of the pair of polymer lines is exposed.
Advantageous Effects
As described above, in accordance with the oil leak detection device of the present invention, reliability can be improved because oil leak can be stably sensed by the polymer line even in a place having a severe change of temperature. Accordingly, an error in generating an oil leak alarm due to a change of surrounding environment can be prevented.
DESCRIPTION OF DRAWINGS
FIG. 1 is a perspective view of the present invention which is exploded for each layer;
FIG. 2 is a diagram showing a positional relationship between a polymer line and holes;
FIG. 3 is a diagram showing a state in which a controller and an oil leak detection device are coupled;
FIG. 4 is a block diagram showing an internal circuit of a controller;
FIG. 5 is a graph showing a change in the resistance value of a polymer line attributable to a change of temperature;
FIG. 6 is a diagram showing another embodiment of the present invention to which an oil pipeline is applied;
FIG. 7 is a diagram showing yet another embodiment of the present invention for detecting oil leak levels;
FIG. 8 is a diagram showing a positional relationship between a polymer line and holes;
FIG. 9 is a diagram illustrating a state in which an oil leak level is detected; and
FIG. 10 is a diagram showing the structure of a conventional oil leak detection device.
 MODE FOR INVENTION
An oil leak detection device in accordance with the present invention is described in detail with reference to the accompanying drawings.
FIG. 1 is a diagram showing the cross section of an oil leak sensor 10 in accordance with an embodiment of the present invention. The oil leak sensor 10 is configured in a tape form in such a way as to be attached to a floor, the surface of a wall, or the outside of a pipe. The oil leak sensor 10 includes an attachment layer 100, a base layer 200, and an upper protection layer 300 which are sequentially stacked from the bottom to the top.
The attachment layer 100 is attached to a place where oil leak is expected to occur and is formed of an adhesive tape, such a double-sided tape.
A pair of conductive lines 210 and 240 made of a silver compound or pure conductive ink having 0 to 20Ωare printed on a top surface of the base layer 200 formed of a film, such as PET, PE, PTFE, or PVC, in a length direction or the pair of conductive lines 210 and 240 made of pure copper, stainless, or iron line having a thin pole form are attached to the top surface of the base layer 200 using an adhesive. A pair of polymer lines 220 and 230 are attached to the top surface of the base layer 200 and are spaced apart from the conductive lines 210 and 240 at specific intervals in parallel to the conductive lines 210 and 240.
The polymer lines 220 and 230 preferably are formed in close proximity, and the conductive lines 210 and 240 are formed outside the polymer lines 220 and 230.
Furthermore, the other ends of the first conductive line 210 and the first polymer line 220 are electrically coupled by a connector, and the other ends of the second conductive line 240 and the second polymer line 230 are also electrically coupled likewise. The polymer lines 220 and 230 can be made of porous or conductive polymer.
Each of the polymer lines 220 and 230 reacts to oil, such as hydrocarbone liquid, and detects whether or not oil leak has occurred by sensing a change of a resistance value due to the reaction.
A method of attaching the polymer lines 220 and 230 to the base layer 200 can include a variety of methods, such as those using an adhesive, ultrasonic fusion, and thermal compression. The polymer lines 220 and 230 can be attached the top surface of the base layer 200 simultaneously with the upper protection layer 300 when the upper protection layer 300 is attached to the top surface of the base layer 200.
The upper protection layer 300 is placed over the base layer 200. A plurality of sensing holes 310 is formed in the upper protection layer 300 at specific intervals in a length direction so that only one (e.g., the polymer line 220) of the pair of polymer lines 220 and 230 is exposed externally as in FIG. 2.
The polymer line 230 not exposed through the sensing holes 310 becomes a reference line for sensing a change of temperature.
Furthermore, the base layer 200 and the upper protection layer 300 stacked as described above are adhered together using thermal compression, ultrasonic fusion, or an adhesive. Here, parts other than the sensing holes 310, the conductive lines 210 and 240, and the polymer lines 220 and 230 are adhered, and the attachment layer 100 can be further attached to the bottom of the base layer 200.
A process of sensing oil leak is described below. As shown in FIG. 3, the oil leak sensor 10 couples the conductive lines 210 and 240 and a signal line 500 through a connector 400 so that the conductive lines 210 and 240 and a signal line 500 are connected to a controller 600.
As shown in FIG. 4, the processor 610 of the controller 600 controls a power source unit 620 so that the power source unit 620 supplies the first conductive line 210 with voltage having several V and determines whether oil leaks or not based on a voltage value from the first polymer line 220. When oil leak is generated and oil enters the sensing holes 310, the volume or the amount of adsorption of the first polymer line 220 is increased, so a resistance value in the first polymer line 220 is increased.
As a result, voltage drops, and the processor 610 determines that oil leaks based on the voltage drop.
Here, a voltage drop value that may occur depending on the length of the oil leak sensor 10 is previously set in a setting value storage unit 630 because voltage inputted to the processor 610 indispensably drops depending on the length of the oil leak sensor 10. If a voltage drop value sensed by the first polymer line 220 is higher than the set voltage drop value, the processor 610 determines that oil leaks and outputs an alarm signal through a display unit 640 and an alarm generation unit 650 in order to inform a manager that oil has leaked.
Meanwhile, an error in sensing oil leak is frequently generated because the first polymer line 220 is made of polymer materials sensitive to temperature and thus sensitive to a change of external temperature. Accordingly, there is a need for a structure for compensating for the frequent error.
A change of a resistance value attributable to a change of temperature is compensated for using the second polymer line 230 adjacent to the first polymer line 220 as a reference. When the power source unit 620 supplies voltage of several V to the second conductive line 240, resistance values of the first polymer line 220 and the second polymer line 230 are identically increased according to a rise of temperature due to the supply of voltage as shown in FIG. 5(a). However, although the resistance values exceed a limit, the processor 610 determines a change of a resistance value attributable to a change of temperature as a normal operating state not oil leak.
In contrast, as shown in FIG. 5(b), when a resistance value of the second polymer line 230 not sensing oil leak is within a limit, but a resistance value of the first polymer line 220 exceeds the limit, the processor 610 determines that oil leak has occurred and thus outputs an alarm through the display unit 640 and the alarm generation unit 650.
Furthermore, the first polymer line 220 and the second polymer line 230 are formed in close proximity to the highest degree so that the same change of temperature is applied to the first polymer line 220 and the second polymer line 230.
FIG. 6 is a diagram showing another embodiment of the present invention. The oil leak sensor 10 of the present invention is received within a flexible pipe 730 in which a plurality of inlet holes 731 through which oil enters is formed. Adsorption fabric 740 is placed within the pipe 730 in which the oil leak sensor 10 is received.
Furthermore, the pipe 730 is buried under an oil pipeline 750 buried in the ground and configured to sense oil leak generated from the oil pipeline 750. When oil is introduced through the inlet holes 731 of the pipe 730, the oil enters the oil leak sensor 10 through the adsorption fabric 740 and thus oil leak is sensed.
Both sides of the oil leak sensor 10 are introduced into the manhole 700 and are coupled by neighboring oil leak sensors and the connectors 720.
A cover 710 is installed over the manhole 700 in order to open or close the manhole 700. Accordingly, the oil leak sensor 10 and the connector 720 can be easily coupled.
FIG. 7 is a diagram showing yet another embodiment of the present invention. Polymer lines 721 are diagonally formed on a top surface of a base layer 720 stepwise in a width direction. The base layer 720 is formed of a film. The polymer lines 721 are coupled by embedded lines 722 having electrical conductivity.
Furthermore, the polymer line 721 at the lowest is connected to a conductive line 723 and configured to receive sensing power from the controller 600.
The polymer line 721 at the highest is also connected to the controller 600 and configured to supply the controller 600 with a voltage value attributable to a change of a resistance value.
An attachment layer 710 is stacked on a bottom surface of the base layer 720. An upper protection layer 730 is stacked on a top surface of the base layer 720. Sensing holes 731 are formed in the top surface of the base layer 720 so that the polymer lines 721 are externally exposed as in FIG. 8.
Accordingly, as shown in FIG. 9, when the oil leak detection device is attached to the body of a wall in order to sense oil leak levels, the controller 600 is informed of a change in the resistance value of the polymer lines 721 at respective locations due to a change of an oil level.
The polymer lines 721 have the same width and length, and the lower end of one polymer line and the upper end of the other polymer line are placed on the same line. Accordingly, a continuous change of oil levels can be sensed based on a consecutive change of resistance values depending on the height of the polymer lines.
That is, if an oil leak sensor is lengthily installed upright and used as a water-level sensor as in the prior art, it is difficult to sense a continuous change of oil levels because of an interval between the sensing holes. However, the present invention is advantageous in that a consecutive change of oil levels can be sensed.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims (2)

The invention claimed is:
1. An oil leak detection device, comprising:
a base film layer configured in a tape form;
a first polymer line and a second polymer line which are formed on a top surface of the base film layer in parallel in a length direction;
a first conductive line and a second conductive line which are formed on the top surface of the base film layer in parallel to the first and second polymer lines in the length direction;
an upper protection film layer attached to the top surface of the base film layer and configured to have a plurality of sensing holes formed at specific intervals in the length direction at locations through which only the first polymer line is exposed, and
a controller determining whether there is oil leak,
wherein:
the second polymer line is a reference line in determining the oil leak, without being exposed through the sensing holes;
when a resistance value of the first polymer line and a resistance value of the second polymer line are identically increased, the controller determines that there is no oil leak; and
when the resistance value of the second polymer line is within a predetermined limit but the resistance value of the first polymer line exceeds the predetermined limit, the controller determines that there is oil leak and generates an alarm.
2. The oil leak detection device of claim 1, wherein the first and second polymer lines are formed in close proximity.
US13/981,447 2011-08-05 2012-03-26 Oil leak detection device Active 2033-01-23 US9354135B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR20110078139A KR20130015854A (en) 2011-08-05 2011-08-05 Apparatus for detecting leakage of hydrocarbon liquid
KR10-2011-0078139 2011-08-05
PCT/KR2012/002180 WO2013022165A1 (en) 2011-08-05 2012-03-26 Device for detecting an oil leak

Publications (2)

Publication Number Publication Date
US20130305815A1 US20130305815A1 (en) 2013-11-21
US9354135B2 true US9354135B2 (en) 2016-05-31

Family

ID=47668651

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/981,447 Active 2033-01-23 US9354135B2 (en) 2011-08-05 2012-03-26 Oil leak detection device

Country Status (6)

Country Link
US (1) US9354135B2 (en)
EP (1) EP2679974A4 (en)
JP (1) JP5777013B2 (en)
KR (1) KR20130015854A (en)
CN (1) CN103328946A (en)
WO (1) WO2013022165A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220034743A1 (en) * 2018-10-16 2022-02-03 3M Innovative Properties Company Leak Detector Film

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104412331A (en) * 2013-07-02 2015-03-11 株式会社俞旻St Composition for oil leak detection and sensor for oil leak detection having same applied thereto
KR101457393B1 (en) * 2013-08-16 2014-11-06 최기환 Sensor for detecting liquid
US9989435B2 (en) * 2013-11-15 2018-06-05 Eaton Intelligent Power Limited Electrically conductive polymers as sensing media to detect leaks in aerospace pneumatic ducts
KR101447988B1 (en) * 2013-11-21 2014-10-13 (주)유민에쓰티 Oil leakage detecting apparatus
CN105987793A (en) * 2015-01-28 2016-10-05 株式会社俞旻St Highly acidic solution leakage sensing device
KR101538507B1 (en) * 2015-03-26 2015-07-23 플로우닉스 주식회사 Leak sensor for side detection
CN105222962A (en) * 2015-11-09 2016-01-06 云南电网有限责任公司红河供电局 Electric power main-transformer leakage of oil detects and pastes
CN108010283B (en) * 2016-10-31 2019-10-29 中国石油化工股份有限公司 A kind of oil depot tank farm oil leakage monitor
CN106595977A (en) * 2016-12-16 2017-04-26 国家电网公司 Equipment insulation oil leakage monitoring alarm apparatus
CN107063580B (en) * 2017-01-22 2023-11-10 柳哲 Thin film type organic liquid leakage detection system
CN108569490A (en) * 2017-03-08 2018-09-25 中国人民解放军后勤工程学院 Oil depot tank bottom oil leak on-line measuring device
KR102067789B1 (en) * 2017-10-27 2020-01-17 해성디에스 주식회사 Leakage detection system and leakage detection method
JP6827915B2 (en) * 2017-12-18 2021-02-10 タツタ電線株式会社 Liquid detection sensor and liquid detection device
CN108584200B (en) * 2018-07-27 2024-08-09 青岛澳科仪器有限责任公司 Oil feeder chassis leak detection sensor
CN108773594B (en) * 2018-07-27 2024-04-16 青岛澳科仪器有限责任公司 Oil gas sensor and oiling machine base and oiling machine applying same
KR102009968B1 (en) * 2018-08-06 2019-08-12 아머스 주식회사 Flexible flat component detection sensor
KR102316047B1 (en) * 2019-05-21 2021-10-26 (주)글로벌센서테크 A leak detection sensor and a composite detection leak detection apparatus including the same
FR3097324B1 (en) * 2019-06-12 2022-06-10 M3S Ind Media condition monitor and related systems and methods
CN114127548B (en) * 2019-07-12 2023-12-26 株式会社恩西提 Detection device for harmful chemical substances
KR102075773B1 (en) * 2019-07-12 2020-03-02 주식회사 엔씨티 Monitoring device for hazardous chemicals
KR102159107B1 (en) * 2019-12-16 2020-09-24 주식회사 엔씨티 Monitoring device for hazardous chemicals
KR102075775B1 (en) * 2019-07-12 2020-03-02 주식회사 엔씨티 Monitoring device for hazardous chemicals
CN111322525B (en) * 2020-04-15 2022-02-08 湖州市南浔创业测绘与土地规划院股份有限公司 Underground pipeline detection method
CN116066762B (en) * 2021-11-03 2025-12-09 台达电子工业股份有限公司 Leakage detection sensor and leakage detection system suitable for same
CN116358663A (en) * 2023-05-17 2023-06-30 深圳市高地自控设备有限公司 Oil leakage detection line, oil storage device, oil leakage detection device and oil leakage detection method
CN117804693A (en) * 2023-12-29 2024-04-02 深圳市英维克科技股份有限公司 Liquid leakage detection device and liquid leakage detection method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677371A (en) * 1984-10-09 1987-06-30 Junkosha Co., Ltd. Sensor for detecting the presence and location of a water leak
US4801865A (en) * 1988-01-19 1989-01-31 California Sensor Corporation Moisture sensor probe with at least two groups of resistive arrays
US20070046481A1 (en) * 2005-09-01 2007-03-01 Vokey David E Moisture detection sensor tape with leak locate
KR100827385B1 (en) 2008-01-09 2008-05-06 (주)유민에쓰티 Physical property leak sensor
KR20110007501A (en) 2009-07-16 2011-01-24 유홍근 Leak detection device
KR20110035232A (en) 2009-09-30 2011-04-06 (주)유민에쓰티 Oil leak detection device of oil tank

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55151250A (en) * 1979-05-15 1980-11-25 Yokohama Rubber Co Ltd:The Detector for oil or the kind
US4404516A (en) * 1980-10-29 1983-09-13 Johnson Jr Victor R System for detecting leaks from liquid-containing reservoirs and conduits
JPS5880536A (en) * 1981-11-09 1983-05-14 Tokyo Tatsuno Co Ltd Installing method for leakage detecting sensor by embedding
JPS58147627A (en) * 1982-02-26 1983-09-02 Hitachi Ltd Fluid leak detection element
US5150603A (en) * 1991-12-13 1992-09-29 Westinghouse Electric Corp. Hydrocarbon vapor sensor and system
JPH06167411A (en) * 1992-11-30 1994-06-14 Tatsuta Electric Wire & Cable Co Ltd Leak detection line
AU6770394A (en) * 1993-05-25 1994-12-20 Rosemount Inc. Organic chemical sensor
US6339951B1 (en) * 1999-07-28 2002-01-22 International Lubrication & Fuel Consultants, Inc. Leak detection and structural assessment
DK2013606T3 (en) * 2006-04-21 2012-05-14 Daspos As Oil Leak Detector
DE102006053202A1 (en) * 2006-11-09 2008-05-15 Areva Np Gmbh Conduit for transporting a liquid, in particular petroleum
KR20090065050A (en) 2007-12-17 2009-06-22 김석진 Product purchase system and service using MMO service

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677371A (en) * 1984-10-09 1987-06-30 Junkosha Co., Ltd. Sensor for detecting the presence and location of a water leak
US4801865A (en) * 1988-01-19 1989-01-31 California Sensor Corporation Moisture sensor probe with at least two groups of resistive arrays
US20070046481A1 (en) * 2005-09-01 2007-03-01 Vokey David E Moisture detection sensor tape with leak locate
KR100827385B1 (en) 2008-01-09 2008-05-06 (주)유민에쓰티 Physical property leak sensor
US20090173143A1 (en) * 2008-01-09 2009-07-09 Yumin System Technology Co., Ltd. Leak sensor apparatus for sensing moisture
KR20110007501A (en) 2009-07-16 2011-01-24 유홍근 Leak detection device
KR20110035232A (en) 2009-09-30 2011-04-06 (주)유민에쓰티 Oil leak detection device of oil tank

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220034743A1 (en) * 2018-10-16 2022-02-03 3M Innovative Properties Company Leak Detector Film

Also Published As

Publication number Publication date
EP2679974A4 (en) 2015-05-27
WO2013022165A1 (en) 2013-02-14
KR20130015854A (en) 2013-02-14
CN103328946A (en) 2013-09-25
JP2014509394A (en) 2014-04-17
JP5777013B2 (en) 2015-09-09
EP2679974A1 (en) 2014-01-01
US20130305815A1 (en) 2013-11-21

Similar Documents

Publication Publication Date Title
US9354135B2 (en) Oil leak detection device
KR20110007501A (en) Leak detection device
US20090173143A1 (en) Leak sensor apparatus for sensing moisture
KR101119823B1 (en) Apparatus for sensing the leak a pipe connection part
KR101200918B1 (en) Leak sensing apparatus having heating function
JP5760027B2 (en) Center for organic liquid detection
KR101326923B1 (en) Sensor for sensing a leak
US6547529B2 (en) Dry tank shutdown system for pumps
WO2010064753A1 (en) Leakage detection apparatus
BR112019022524A2 (en) DEPTH PRECISION SENSOR
JP2002107259A (en) Detector for detecting the location of damage to the impermeable film in a landfill
KR20120128477A (en) Oil leakage detecting apparatus for explosion-proof area
KR20150131888A (en) Water leak detection sensor
KR101030342B1 (en) Capacitive water level sensor and system
KR101500515B1 (en) Oil leakage detecting apparatus
KR100859568B1 (en) Capacitive water level sensor and system
KR101043754B1 (en) Proximity High Capacity Detection Level Control Sensor for Hot Water Boiler of Hot Water Mat
KR20110026738A (en) Water level sensor
US20060125647A1 (en) Aquarium water-level detector
KR200472545Y1 (en) Apparatus for sensing leakage and level of oil
KR101071071B1 (en) Electrostatic capacitance type system for detecting liquid level
KR101695863B1 (en) Fluid level sensor
KR20220092017A (en) Leak detecting sensor
KR20180044529A (en) Drainageway type oil detection apparatus
KR101447988B1 (en) Oil leakage detecting apparatus

Legal Events

Date Code Title Description
STCF Information on status: patent grant

Free format text: PATENTED CASE

AS Assignment

Owner name: YUMIN SYSTEM TECHNOLOGY CO., LTD., KOREA, REPUBLIC

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YU, HONG GEUN;REEL/FRAME:046515/0648

Effective date: 20180727

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YR, SMALL ENTITY (ORIGINAL EVENT CODE: M2551); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY

Year of fee payment: 4

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YR, SMALL ENTITY (ORIGINAL EVENT CODE: M2552); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY

Year of fee payment: 8